Vulnerabilities CVE-2026-44592

CVE-2026-44592

Critical

Open

TLP:CLEAR

Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning

NVD CVE.org

Ransomware

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Description

Gradient is a nix-based continuous integration system. In 1.1.0, when GRADIENT_DISCOVERABLE=true (the default, and the NixOS module default), anyone who can reach /proto can register as a worker without any credentials by sending a fresh, never-registered worker UUID. The resulting session has PeerAuth::Open, i.e. it sees jobs from every organisation, and can immediately NarPush/NarUploaded arbitrary store paths into nar_storage and the cached_path table. This vulnerability is fixed in 1.1.1.

Details

CVSS Score: 9.4
EPSS Score ⓘ: 0.16%

5.3th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Confidence: 90%
Published: May 14, 2026
Last Modified: May 14, 2026

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